Business Name Availability
**Built for founder-formation workflows.** If you are building a product that helps founders incorporate, the first step of every flow is the same question: is this name available? This API answers that question in a single call. Domain availability across .com / .net / .org / .io, Secretary of State entity search across 6 states, and USPTO trademark conflict detection are run in parallel and…
5 subscribers
9.1/10 popularity
3586 ms avg latency
97% success rate
5 endpoints
The in-depth APIMemo review for this API hasn't been published yet —
the data below comes straight from the public marketplace listing.
Business Name Availability endpoints
| Method | Endpoint | Description |
|---|---|---|
| GET |
Health Check /health |
Returns the API status and version. No authentication required. |
| GET |
Full Business Name Check /check |
⚠️ Coming Soon - This endpoint is currently under maintenance and will be available shortly. |
| GET |
Domain Availability /check/domain |
Checks domain availability for the given business name across four TLDs: .com, .net, .org, and .io using live WHOIS lookups. Returns true if the domain is available, false if… |
| GET |
State SoS Check /check/state |
Checks whether the business name is already registered with a US Secretary of State registry. Supported states: FL (Florida Sunbiz) and DE (Delaware ICIS). Returns available:… |
| GET |
Trademark Search /check/trademark |
⚠️ Coming Soon - This endpoint is currently under maintenance and will be available shortly. |
Business Name Availability pricing
| Plan | Price | Rate limit | Quotas |
|---|---|---|---|
| BASIC | Free | 5 / minute |
|
| PRO | $29 / month | 30 / minute |
|
| ULTRA | $49 / month | 60 / minute |
|
| MEGA | $99 / month | 120 / minute |
|
